package com.atguigu.gulimall.search.thread;

import java.util.concurrent.*;


public class ThreadTest {

    public static ExecutorService service = Executors.newFixedThreadPool(10);

    public static void main(String[] args) throws ExecutionException, InterruptedException {

//         System.out.println("main......start.....");
//         Thread thread = new Thread01();
//         thread.start();
//         System.out.println("main......end.....");

//        System.out.println("main......start.....");
//        Runable01 runable01 = new Runable01();
//        new Thread(runable01).start();
//        System.out.println("main......end.....");

//        System.out.println("main......start.....");
//        FutureTask<Integer> futureTask = new FutureTask<>(new Callable01());
//        new Thread(futureTask).start();
//        System.out.println(futureTask.get());
//        System.out.println("main......end.....");

//        System.out.println("main......start.....");
//        service.execute(new Runable01());
//        Future<Integer> submit = service.submit(new Callable01());
//        submit.get();
//        System.out.println("main......end.....");

//        System.out.println("main......start.....");
//         CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
//             System.out.println("当前线程：" + Thread.currentThread().getId());
//             int i = 10 / 2;
//             System.out.println("运行结果：" + i);
//         }, service);
//        System.out.println("main......end.....");

        /**
         * 方法完成后的处理
         */
//        System.out.println("main......start.....");
//        CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
//            System.out.println("当前线程：" + Thread.currentThread().getId());
////            int i = 10 / 2;
//            int i = 10 / 0;
//            System.out.println("运行结果：" + i);
//            return i;
//        }, service).whenComplete((res, exception) -> {
//            //虽然能得到异常信息，但是没法修改返回数据
//            System.out.println("异步任务成功完成了...结果是：" + res + "，异常是：" + exception);
//        }).exceptionally(throwable -> {
//            //可以感知异常，同时返回默认值
//            return 10;
//        });
//        Integer integer = future.get();
//        System.out.println("main......end.....感知异常返回默认值："+integer);

        /**
         * 方法执行完后端处理
         */
//        System.out.println("main......start.....");
//        CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
//            System.out.println("当前线程：" + Thread.currentThread().getId());
//            int i = 10 / 2;
//            System.out.println("运行结果：" + i);
//            return i;
//        }, service).handle((result, thr) -> {
//            if (result != null) {
//                return result * 2;
//            }
//            if (thr != null) {
//                System.out.println("异步任务成功完成了...结果是：" + result + "异常是：" + thr);
//                return 0;
//            }
//            return 0;
//        });
//        Integer integer = future.get();
//        System.out.println("main......end.....感知异常返回值："+integer);


        /**
         * 线程串行化
         * 1、thenRunL：不能获取上一步的执行结果
         * 2、thenAcceptAsync：能接受上一步结果，但是无返回值
         * 3、thenApplyAsync：能接受上一步结果，有返回值
         */
//        System.out.println("main......start.....");
//        CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
//            System.out.println("当前线程：" + Thread.currentThread().getId());
//            int i = 10 / 2;
//            System.out.println("运行结果：" + i);
//            return i;
//        }, service).thenApplyAsync(res -> {
//            System.out.println("任务2启动了..." + res);
//            return "Hello " + res;
//        }, service);
//        System.out.println("main......end....." + future.get());

    }

    private static void threadPool() {
        ExecutorService threadPool = new ThreadPoolExecutor(
                200,
                10,
                10L,
                TimeUnit.SECONDS,
                new LinkedBlockingDeque<Runnable>(10000),
                Executors.defaultThreadFactory(),
                new ThreadPoolExecutor.AbortPolicy()
        );
        //定时任务的线程池
        ExecutorService service = Executors.newScheduledThreadPool(2);
    }


    public static class Thread01 extends Thread {
        @Override
        public void run() {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Runable01 implements Runnable {
        @Override
        public void run() {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Callable01 implements Callable<Integer> {
        @Override
        public Integer call() throws Exception {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
            return i;
        }
    }

}
